---
description: Call expressions are not allowed in templates except in output handlers.
options: null
optionsDescription: Not configurable.
rationale: The change detector will call functions used in templates very often. Use an observable instead.
ruleName: template-no-call-expression
type: maintainability
typescriptOnly: true
layout: rule
title: 'Rule: template-no-call-expression'
optionsJSON: 'null'
---